涟源煤盆地测水组煤的区域岩浆热变质作用

湘中涟源煤盆地测水组煤煤种单一，绝大部分为无烟煤，故以往有关其变质作用的研究较煤种多样化的龙潭组煤来说要少得多，为了改变这种状况，通过对研究区测水组煤镜质且反射率的系统测定和收集及煤的Ｘ射线衍射分析等手段，研究了涟源煤盆地测水组煤煤级、煤变质分区、煤变质带展布、煤变质梯度、煤化学结构的空间变化特征、煤盆地周缘印支－燕山运动期岩体的产热储热条件及埋深对煤变质程度的影响，上述研究结果及与煤共生的区域性

THE REGIONAL MAGMATIC THERMAL METAMORPHISM OF THE CESHUI FORMATION COAL IN LIANYUAN COAL BASIN

The coal category in Ceshui formation in Lianyuan basin in the middle part of Hunan Province is simple, most are anthracite, so, in the past, the study on its metamorphism was more less than that of various categories of Longtan formation. For changing this situation, by means of systematic measurement of reflectance of vitrinite and X ray diffraction analysis of Ceshui formation coal, the spatial change characteristics of coal rank, coal metamorphic regions, the extension of coal metamorphic belts, coal metamorphic gradients, coal chemical structure and the effect on degree of metamorphism of the heat production and storage condition, buried depth of the granite in Indo China Yanshan movement in the edge of Lianyuan basin was discussed. The above mentioned research results and features of regional hydrothermal alterations, endogenetic deposit which paragenesis with Ceshui formation coal, and development of secondary vesicles in coal shows that the regional magmatic thermal metamorphism is the main reason of metamorphism of Ceshui formation coal in Lianyuan basin in the middle part of Hunan Province.